There has recenlty been increasing public awareness about the availability and importance of carrier screening for couples before they start their family. Couples may unknowingly be at risk of having a child with a serious genetic disorder, and carrier testing allows couple to clarify their risk. Those couples identified at increased risk may decide to have prenatal testing, IVF, or explore other options to avoid having an affected child.
Here is a linkto an article in The Age stating that 1:20 individuals are carriers for a genetic condtion such as Fragile X syndrome, cystic fibrosis, or spinal-muscular atrophy. The majority had no family history of these conditions.
For a longer read, check out this article called "Modern Family Planning" from Genome Magazine
There are now a number of different tests availalbe for preconception carrier screening. They range in price and coverage. The counsellors at The Genetic Clinic can advice you the best for you.